Effect of acidulated phosphate fluoride application on microhardness of glass ionomer cement

Mohammad Azrul Izzudin; Elin Karlina; Ratna Indriyanti

doi:10.24198/pjd.vol27no2.26675

Effect of acidulated phosphate fluoride application on microhardness of glass ionomer cement

Mohammad Azrul Izzudin, Elin Karlina, Ratna Indriyanti

Abstract

Introduction: Acidulated phosphate fluoride (APF) gels are commonly used as preventive caries materials in paediatric dentistry while glass ionomer cements (GICs) are widely used as a restorative material. The purpose of this study was to determine the effect of acidulated phosphate fluoride application towards the microhardness of GIC. Methods: This study was an experimental laboratory study where ten specimens were prepared from high viscosity GIC, which was Fuji IX. Specimens were stored in 50 ml distilled water at first 24 hours at 37°C, and then specimens were divided into fluoride group which was immersed in 25 ml of 1.23 % APF gel and control group which was stored 25 ml distilled water for 24 hours at 37°C. The Micromet II Microhardness Tester, Buehler, IL, USA that was standardised for Vickers hardness test was used to test the specimens at 100-gram load. Data were analysed using the t-test comparison test. Results: The level of microhardness of the fluoride group (14.34) was much lower compared to the control group (43.21) with a highly significant difference (p<0.01). Conclusion: The application of 1.23% APF gel on high viscosity GIC reduces the microhardness level compared to the control group.

Keywords

Glass ionomer cement, acidulated phosphate fluoride, topical fluoride, microhardness.

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References

Welbury R, Dunggal MS, Hosey MT. Pediatric dentistry. 3rd ed. Oxford University Press. Michigan University. 2005

Finn SB. Clinical pedodontic. 4th ed. W.B. Saunder Co. St. Louis. 2003.

Walmsley AD, Walsh TF, Burke FJT, Shortall ACC, Lumley PJ, Hayes-Hall R. Restorative dentistry, elsevier health sciences. 2007.

Salama FS, Elmallakh BF, Pedo C. Effect of apf application on the microhardness of light-activated restorative material. J Sau Dent, 1996;8:81-6.

Ylp HK, Smales RJ. Fluoride release and uptake by aged resin-modified glass ionomers and apolyacid modified resin composite. Int Dent J. 1999 Aug;49(4):217-25.

Kula K, Nelson S, Kula T, Thompson V. In Vitro Effect of acidulated phosphate fluoride gel on the surface of composites with different filler particles. J Prosthet Dent. 1986 Aug;56(2):161-9.

Crisp S, Lewis BG, Wilson AD. Characterization of glass ionomer. cements. a study of erosion and water absorption in both neutral and acidic media. J Dent. 1980 Mar;8(1):68-74.

Gill NC, Pathak A. Comperative evaluation of the effect of topical fluoride on the microhardness of various restorative material: An in vitro study. J Indian Soc Pedod Prev Dent. 2010 Jul-Sep;28(3):193-9.

O’Brien WJ. Physical properties in dental material and their selection 3rd Ed. Illinois, Quintessenc: Publishing CO. 2002.

Anusavice KJ. Philips’ science of dental materials 11th ed. St. Louis. Missouri;Elsevier Inc. 2003.

Nadia I, Faisal B, Saqib R, Taslem H. Comparison of conventional glass ionomer cement and compomer in class ii restoration in primary molar: six months study. J Pakistan, Dent Assoc 2012;21:24-7.

Yip HK, Lam WT, Smales RJ. Surface roughness and weight loss of esthetic restorative materials related to fluoride release and uptake. J Clin Pediatr Dent. 1999 Summer;23(4):321-6.

García-Godoy F, García-Godoy A, García-Godoy F. Effect of a minute foam on the surface roughness, hardness, and micro morphology of high viscosity glass ionomer. J Dent Child (Chic). 2003 Jan-Apr;70(1):19-23.

Smith GE. Surface deterioration of glass ionomer cement during acid etching an sem evaluation. Oper Dent. 1988 Winter;13(1):3-7.

DOI: https://doi.org/10.24198/pjd.vol27no2.26675